WIKA LGG serie Betriebsanleitung Seite 17

5. Commissioning, operation
CAUTION!
Checking the screw connections
Due to the settling of the components on the glass indicator,
the screw connections must be checked as in chapter 5.2
"Mounting of models LGG-R, LGG-T, LGG-M":
▶
Immediately after commissioning
▶
Repeat every 24 hours until each screw connection
retains its torque
Valves with ball-check valve
Initially, these valves may only be partially opened until a pressure
compensation has occurred in the glass level gauge:
Handwheel: ½ ... 1 turn
■
Quick closing lever: 20°
■
Double valves: Open the quick closing lever completely,
■
handwheel: ½ ... 1 turn
If opened 100 % immediately, the ball prevents the inlet/outlet. See
chapter 2.5 "Illustration of the ball-check valve principle".
Adjustment to the medium temperature
If the medium temperature and the ambient temperature deviate from
one another, the glass level gauge can be rinsed with the medium to
ensure temperature adjustment in order to avoid thermal stresses.
Connect the hose to the outlet side of the drain valve and ensure safe
■
drainage
Partially open the drain valve
■
Partially open the upper valve head
■
Once the glass level gauge has reached the operating temperature,
■
close the upper valve head
Allow the medium to drain, then close the drain valve and remove the
■
hose
Operating instructions glass level gauge, model LGG
EN
17